MTX-DIN Family
www.mtxm2m.com
2015/10 v2.3
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MTX M2M® by MATRIX ELECTRONICA S.L.U
5.2
Status LEDs
The MTX-DIN modem has one status LED (view location on device label, section 4.2.1) called
“GSM
SYNC”
which is handled automatically by the modem and indicates its different operating modes. The
behavior of GSM SYNC LED is configured by AT commands, depending on whether 2G or 3G models
are used.
5.2.1
2G models
The LED mode configuration is set by the AT^SSYNC command
LED behavior
ME operating status if AT^SSYNC=1
ME operating status if AT^SSYNC=2
Permanently off
ME is in one of the following modes:
- POWER DOWN mode
- AIRPLANE mode
- CHARGE ONLY mode
- NON-CYCLIC SLEEP mode
- CYCLIC SLEEP mode with no temporary wake-up
event in progress
ME is in one of the following modes:
- POWER DOWN mode
- AIRPLANE mode
- CHARGE ONLY mode
600 ms on / 600ms off
Limited Network Service: No SIM card inserted or
no PIN entered, or network search in progress, or
ongoing user authentication, or network login in
progress.
Same as for AT^SSYNC=1
75 ms on / 3 s off
IDLE mode: The mobile is registered to the GSM
network (monitoring control channels and user
interactions). No call is in progress.
Same as for AT^SSYNC=1
75 ms on / 75 ms off / 75 ms
on / 3 s off
One or more GPRS PDP contexts activated.
Same as for AT^SSYNC=1
500 ms on / 50 ms off
Packet switched data transfer is in progress.
Same as for AT^SSYNC=1
Permanently on
Depending on type of call:
Voice call: Connected to remote party. Data call:
Connected to remote party or
exchange of parameters while setting up or
disconnecting a call.
Same as for AT^SSYNC=1
<n> ms on / <n> ms off
Not possible: With AT^SSYNC=1, LED signalization is
disabled in SLEEP mode.
SLEEP mode is activated (AT+CFUN parameter
<fun> ≠ 1), but the ME is not registered to the GSM
network (e.g. SIM not inserted or PIN not entered,
and therefore, either no network service or only
Limited Network Service is available.
25 ms on / 4 * <n> ms off
Not possible: With AT^SSYNC=1, LED signalization is
disabled in SLEEP mode.
SLEEP mode is activated (AT+CFUN parameter
<fun> ≠ 1) while the ME is registered to the GSM
network and in IDLE mode.
25 ms on / <m> ms off / 25
ms on / 3 * <m> ms off
Not possible: With AT^SSYNC=1, LED signalization is
disabled in SLEEP mode.
SLEEP mode is activated (AT+CFUN parameter
<fun> ≠ 1) while the ME is registered to the GSM
network. Additionally, PDP context is activated.
5.2.2
3G models
The LED mode configuration is set by the AT^SLED command.
Modem status
<mode>=1
<mode>=2
<flash>=default
<mode>=2
<flash>=user defined
GSM CS data call in progress or established
GSM voice call in progress or established
UMTS voice call in progress or established
UMTS CS data call in progress
Permanently ON
10ms ON
990ms OFF
<flash> ms ON
990 ms OFF
GSM PS data transfer
UMTS data transfer
Permanently ON
10ms ON
1990ms OFF
<flash> ms ON
1990 ms OFF
ME registered to a network. No call, no data transfer
Permanently ON
10ms ON
1990ms OFF
<flash> ms ON
3990 ms OFF
Limited Network Service (e.g. no SIM, no PIN or during
network search)
500ms ON
500ms OFF
10ms ON
990ms OFF
<flash> ms ON
990 ms OFF
